Ralph Nicolas Köster (22 February 1989 – 12 July 2023) was a South African rugby union player.
Köster attended Bishops College in Cape Town and played in their First XV rugby team in 2006 and 2007.
[2] He made his Super Rugby debut for the Stormers in 2009, playing on the wing, but suffered a knee injury against the Lions at Newlands Stadium which put him out of action.
He and his wife had also hosted young people from Madadeni during Project Zulu fundraising choir tours in 2015 and 2016.
[5] Soon after leaving Bristol, Köster joined Cambridge University to study an MSt in Social Innovation.